If you have a 2 node Exchange 2007 CCR cluster, you may come across a scenario where you create or remove a user account and you find that the OAB is not updating.

The most probable and common cause of this is an incorrect setting in the registry. If you open regedit on each cluster node and navigate to the following registry key:

HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\<Cluster Name>\EnableOabGenOnThisNode

Make sure that this parameter is set to the <active node name>. If it isn’t, just right click this registry key and modify. If this registry key does not exist then it may need to be created.

I recently had a situation recently where I had a stale VPN session that I needed to kill in ISA 2006. I opened the ISA console and navigated to Monitoring >> Sessions tab.

After editing the filter, I could see all active VPN sessions, I right clicked the session that I no longer wanted active and selected ‘Disconnect VPN Tunnel’.

I was presented with the following error:

Solution:

You can kill an active VPN session by opening the RRAS mmc snap-in to manage the active VPN sessions.

You can then Right Click on the user whose session needs to be killed and Disconnect